<?php

class CategoryController extends Controller
{
    /**
     * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
     * using two-column layout. See 'protected/views/layouts/column2.php'.
     */
    public $layout='column2';

    /**
     * @return array action filters
     */
    public function filters()
    {
            return array(
                    'accessControl', // perform access control for CRUD operations
            );
    }

    /**
     * Specifies the access control rules.
     * This method is used by the 'accessControl' filter.
     * @return array access control rules
     */
    public function accessRules()
    {
            return array(
                    array('allow',  // allow all users to perform 'index' and 'view' actions
                            'actions'=>array('index','view'),
                            'users'=>array('*'),
                    ),
                    array('allow', // allow authenticated user to perform 'create' and 'update' actions
                            'actions'=>array('create','update'),
                            'users'=>array('@'),
                    ),
                    array('allow', // allow admin user to perform 'admin' and 'delete' actions
                            'actions'=>array('admin','delete'),
                            'users'=>array('admin'),
                    ),
                    array('deny',  // deny all users
                            'users'=>array('*'),
                    ),
            );
    }

    /**
     * Displays a particular model.
     * @param integer $id the ID of the model to be displayed
     */
    public function actionView($id)
    {
            $this->render('view',array(
                    'model'=>$this->loadModel($id),
            ));
    }

    /**
     * Creates a new model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     */
    public function actionCreate()
    {
            $model=new Category;

            // Uncomment the following line if AJAX validation is needed
            // $this->performAjaxValidation($model);

            if(isset($_POST['Category']))
            {
                    $model->attributes=$_POST['Category'];
                    if($model->save())
                            $this->redirect(array('view','id'=>$model->id));
            }

            $this->render('create',array(
                    'model'=>$model,
            ));
    }

    /**
     * Updates a particular model.
     * If update is successful, the browser will be redirected to the 'view' page.
     * @param integer $id the ID of the model to be updated
     */
    public function actionUpdate($id)
    {
            $model=$this->loadModel($id);

            // Uncomment the following line if AJAX validation is needed
            // $this->performAjaxValidation($model);

            if(isset($_POST['Category']))
            {
                    $model->attributes=$_POST['Category'];
                    if($model->save())
                            $this->redirect(array('view','id'=>$model->id));
            }

            $this->render('update',array(
                    'model'=>$model,
            ));
    }

    /**
     * Deletes a particular model.
     * If deletion is successful, the browser will be redirected to the 'admin' page.
     * @param integer $id the ID of the model to be deleted
     */
    public function actionDelete($id)
    {
            if(Yii::app()->request->isPostRequest)
            {
                    // we only allow deletion via POST request
                    $this->loadModel($id)->delete();
                    
                    // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
                    if(!isset($_GET['ajax']))
                            $this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
            }
            else
                    throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
    }

    /**
     * Lists all models.
     */
    public function actionIndex()
    {
            $dataProvider=new CActiveDataProvider('Category');
            $this->render('index',array(
                    'dataProvider'=>$dataProvider,
            ));
    }

    /**
     * Manages all models.
     */
    public function actionAdmin()
    {
            $model=new Category('search');
            $model->unsetAttributes();  // clear any default values
            if(isset($_GET['Category']))
                    $model->attributes=$_GET['Category'];

            $this->render('admin',array(
                    'model'=>$model,
            ));
    }

    /**
     * Returns the data model based on the primary key given in the GET variable.
     * If the data model is not found, an HTTP exception will be raised.
     * @param integer the ID of the model to be loaded
     */
    public function loadModel($id)
    {
            $model=Category::model()->findByPk($id);
            if($model===null)
                    throw new CHttpException(404,'The requested page does not exist.');
            return $model;
    }

    /**
     * Performs the AJAX validation.
     * @param CModel the model to be validated
     */
    protected function performAjaxValidation($model)
    {
            if(isset($_POST['ajax']) && $_POST['ajax']==='category-form')
            {
                    echo CActiveForm::validate($model);
                    Yii::app()->end();
            }
    }
}
